Molding-machine.



PATENTED JULY 30, 1907.

A. & D. HELLER. MOLDING MACHINE. APPLICATION FILED SEPT. 22,1906.

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No 862,073. PATENTEDQJULY so, 1907. A. & 1). HELLER.

MOLDING MACHINE.

APPLICATION FILED saw. 22. 1906.

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PATENTED JULY 30, 1907.

A. & D. HELLER.

MOLDING MACHINE.

APPLICATION FILED SEPT. 22, 1906.

5 SHEETS-SHEET 4.

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No. 862,073. PATENTED JULY 30, 1907.

- A. & D. HELLER.

MOLDING MAOHINE.

APPLICATION FILED SEPT. 22, 1906.

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UNITED STATES PATENT FFTCE.

ADAM HELLER AND DAVID HELLER, OF BALTIMORE, MARYLAND; SAID ADAM HELLERASSIGNOR TO SAID DAVID HELLER.

MOLDING-MACHINE To all whom it may concern:

Be it known that we, ADAM HELLER and DAVID HELLER, citizens of theUnited States, residing at Baltimore city, State of Maryland, haveinvented certain new and useful Improvements in Molding-Machines, ofWhich the following is a specification.

This invention relates to molding machines, and especially to the classof machines for forming sand molds such as are used in the manufactureof cast-metal pipe, pipe fittings and other analogous articles.

The object of the invention is to provide, in a molding machine, meansto automatically control successive charges of sand from a hopper to asand box, and from the latter to a flask.

A further object of the invention is to provide, in a molding machine, aflask cover adapted to be swung to open and close the flask and therebyoperate a pair of slides or cut-off plates for delivering successivecharges of sand to the flask.

A still further object of the invention is to provide, in a moldingmachine, a swinging flask cover adapted to slide a pair of shutters orcut-off plates alternately to deliver successive charges of sand firstto the sand box and then to the flask simultaneously with closing andopening, respectively, of the flask by the said cover.

A still further object of the invention is to provide, in a moldingmachine, a flask cover hung to swing separate and independently of theflask, a rammer carried by the cover and adapted to be coupled to thecover when the latter is raised, and means carried by the cover to lockit in closed position and to release the rannner when the cover isclosed.

Various other advantages, improved results and details of construction,combinations and arrangements of parts will be found in thespecification and claims to follow.

In the accompanying drawings, forming part of this application: Figure 1is a front view of the machine. Fig. 2 is a section on the line x'.t,Fig. 1, showing the flask cover in open position, with the conveyer, theflask and its truck removed, and the flask lifter partly broken away.Fig. 3 is a detail top view of the flask cover showing in dotted linesthe movable position of its parts. Fig. 4 is a section on the line yy,Fig. 3. Fig. 5 is a detail top view of the flask lifter, the dottedlines showing the movable position of the levers. Fig. 6 is aperspective view of the slides or cut-offs, and their operating levers.Fig. 7 is a perspective view of one of the lift-dogs. Fig. 8 is a sideelevation of the flask lifter and carrier partly broken away.

The same reference numerals denote the same parts throughout the severalviews of the drawings.

The sand hopper 1, has a neck 2 inwhich is located a sand siftercomposed of shaker plates 3, operated by Specification of LettersPatent.

Application filed September 22, 1906- Serial No. 335,810.

Patented July 30, 1907.

eccentrics 4, and eccentric rods 4, which are worked by an eccentricshaft 5, from a main shaft 6 to slide the plates back and forthlengthwise. The shaft 6 drives the endless conveyer 7, by a chain 6, andsprocket wheels 7, and the conveyer carries the sand from under thecarriage 8, as the latter is moved up to and over a sand dump or pile,into the hopper whence it is sifted into the hopper neck. The carriagehas a suitable track 1, on which a truck 2 travels with a molding flask3.

Depending from the hopper-neck 2 is a sand-box 9, between which and thesaid neck is operated a pair of slides or cut-offs 10, each of which ispivotally connected by links 11 to a bar 12, pivoted to a projection 13from the sand-box. The cut-offs 10 have extensions 14 to preventdisplacement in their sliding movement; The bar 12 has one end of aswinging arm 15 pivoted thereto and the other end of said arm is looselyhung from a guide bracket 16 on the sand-box by a bar 17 pivoted to thesaid loose end and working through said bracket. The bottom edge of thebar 12 is provided with lugs 18 and 19, so as to leave a space betweenthem into which the free side edge of the flask cover 20 is swung.

The cover 20 is hinged at 21 to be swung vertically over the flask andunder the sand-box by levers 22, connected together at their outer endby a handle 23, and pivoted at their inner end to standards 24-, whichlimit the upward movement of the lovers 22, in working the sand rammer25, which depends from the cover 20, and is hung from the standards 24,and the lovers 22, by projections 26 extending from the ranimer throughslots 27, in the cover 20. These projections26 are pivoted to levers 28which are fulcrumed to the said projections and pivoted to links 29which are pivoted to the levers 22. The cover 20, levers 22, handle 23,bar 12, and the mechanism connecting said bar with the slides orcut-offs constitute means for operating the cut-offs.

The means for automatically locking the cover and releasing the rammer,and for unlocking the cover and coupling the rammer thereto, comprises alatch-plate 30, slidably secured to the cover 20, and adapted to engageunder a keeper 31, on the machine frame 32, and the lift-dogs 33,connected to the latch-plate 30, by links 34. The plate and the dogs areoperated by a handlever 35 pivoted to a bracket 36 on the front frameportion of the machine, and having a pair of links pivoted together, oneof which links 37 is pivoted to the lever 35, and the other link 38 ishinged to the latch-plate 30. The dogs are pivoted at 39 to the cover20, and both being alike, only one of them will be described in detail;it has a pivot hole 40, and its free end has a curved or beveled lug 41,to insure its passage under the levers 28, and terminating in a topbearing 42 upon which the levers 28 rest when the rammer is coupled tothe cover 20, and the latter is unlocked. I

The flask-lifter comprises a pair of arms 43 having at their rear endsadjustable weights 44, links 45, pivoted to the sand box 9, and to saidarms, and an expansible flask carrier swung from the front end of thearms 43. The said carrier consists of a pair of hangers 46 pivotallyhung from the front end of the arms 43, and having inward projections47, a bracket 48 revolubly connected to the free end of each hanger 46,and provided with apertures 49 for the flask handles 50. The means forexpanding the carrier preparatory to having the brackets 48 receive anddischarge a flask, and for fixing and "releasing said brackets withrespect to the hangers 46, comprises levers 51, one of which is pivotedto each projection 47 of the hangers 46, said levers having notches 53to engage the brackets 48, and a suitable handle 54, for raising andlowering the levers 51, and for guiding and operating the flasklifter; apair of toggle levers 55 having one end secured to the levers 51 and theother end pivoted to a hand lever 56 is provided for expanding andcontracting the flask carrier. The main shaft 6 being operated, operatesthe conveyer and the eccentric shaft 5-, which operates the eccentrics4, and the eccentric rods 4 to slide the shaker-plates lengthwise.

The conveyor and the sitter being in operation, a truck holding a flaskin position to be filled, and the cover 20 down, the operation of theother parts is as follows: Thehand lever is pushed inwardly, whichunlocks the cover, and slides the dogs under the levers 28, thus leavingthe cover free to be swung with the rammer coupled thereto, the handle23 is then depressed to raise or swing the cover and the rammer togetherupwardly into vertical position, as the cover is thus swung its freeside edge strikes the lug 19 of the arm 15 and operates the cut-offlever and links to withdraw the lower slide or cut-off and open thebottom of the sand-box to permit the sand to fall from the sand box intothe flask, the top slide or cut-off having been pushed inwardly to closethe top of the sand-box during the withdrawal of the bottom cut-off,prevents the sand entering the box while the flask cover is in raisedposition. The handle 23 is now raised to lower the cover and the rammertogether, which throws the said cover-edge against the lug 18 of the bar12 and reverses the relative position of the cut-offs as the coverdescends over the flask so as to open communication between the sand boxand the funnel neck and to close the bottom of the sand box, thehand-lever 35 is then pulled thereby withdrawing the dogs from under thelevers 28 and sliding the latch under the keeper so as to lock the coverabove the flask and leave the rammer free to pack the sand in the flask,which is accomplished by working the hand-lever 23. When the flask issufficiently packed the rammer is raised and the flask run out on thetruck, where the flask is removed by the flask-lifter and flask carrierin the manner now to be explained: The hand-lever 56 is moved to theleft which expands the carrier while the brackets 48 are slid in lockedposition onto the flask handles, this lever being released contacts thecarrier, the handle 54 is used to swing the flask into desired position,then the handle 54 is raised to release the brackets and permit them tobe turned as desired to deposit the flask while the brackets are againheld expanded.

It is obvious that variations in details of arrangement and constructionof parts may be made in the practical application of the invention, thatthe ma chine may be driven wholly or in part either by hand or otherpower, and that while the machine is exemplifled for pipe molds it isquite adaptable for molds of various other characters.

Having thus described our invention, what we claim as new and desire tosecure by Letters Patent is:

1. In a molding machine,-a sand receiving and discharge box or chute, aswinging rammer, and means operated by the swinging of the rammer forsuccessively holding and releasing charges of sand in and from thechute.

2. In a molding machine, a sand-box or chute, a swinging rainmer, slidesin the box or chute, and means by which the rammer is swung foroperating the slides to alternately open and close the top and bottom ofthe box.

3. In a molding machine, asandbox or chute, a swinging flask-cover, arammer carried by the cover, means for swinging the cover, and meansoperated by the cover to open and close the discharge from the box intothe flask simultaneously with the raising and lowering of the cover.

4. In a molding machine, a sandbox, a flask cover hav ing a sandentrance and exit adapted to swing under the box and over the flask, arammer carried by the cover, means for swinging the cover, and meansoperated by the movement of the cover to open and close the sandentrance and exit of the box simultaneously with the lowering andraising of the cover.

5. In a molding machine, a flask cover and a rammer hung to swingjointly over the flask, a sand-box above the path of the cover andhaving a sand entrance and exit, nieanscarried by the cover to operateit and the rammer, and means operated by the cover to alternately openand close the sand entrance and exit of the box simultaneously with theraising and lowering of the cover.

6, In a molding machine, a flask cover hung to swing vertically over theflask to open and close it, a sandbox above the path of the cover, asand rammer carried by the cover, means for swinging the cover andoperating the rammer, and means operated by the cover to furnishsuccessive charges of sand from the box to the flask.

7. In a molding machine, a sand-box, slides carried by the box forsuccessively charging the box with and releasing therefrom compacts ofsand, a flask cover, a ramrner hung from the cover, means for swingingthe cover and working the rammer, and means operated by the cover towork the slides for eftecting said charge and release simultaneouslywith the raising and lowering of the cover.

8. In a molding machine, the combination, with a rammer, and a flaskcover having the rammer hung therefrom, of means for coupling andreleasing the rammer and cover, and means for swinging the cover and foroperating the rammer.

9. In a molding machine, the combination with a flask cover and arammer, of means for swinging the cover under which the rammer is hung,and means for fixing the ramnier to and releasing it from the cover. 7

10. In a molding machine, the combination with a flask, a flask coverindependent of the flask, and a rammer operated from the cover, of acover lock, and means operated by the movement of the lock to couple anduncouple the rammer with the cover.

11. In a molding machine, the combination with a swinging flask cover arammer carried by the cover, a sand box, and a pair oi slides workingtherein, of an arm having lugs engaged by the said cover to work thearm, and the connections between the said arm and the slides to operatethe latter.

12. In a molding machine, the combination with a swing ing flask cover,a sand rammer hung from the cover, and means for swinging the cover, ofa latch to lock the cover above the flask, a pair of dogs to fix andrelease the rammer with respect to the cover, and means for operatingthe latch and the dogs.

13. In a molding machine employing suitable flasks, a

sand hopper, a pair of slides or valves working through the hopper, aflask cover hung to swing under the valves, a rammer carried by thecover, and mechanism to lock and unlock the rammer with the cover and tolock the cover over the flask simultaneously with said unlocking of therammer.

14. In a molding machine, employing suitable flasks, a sand hopper,swinging flask-cover, means operated by the cover for supplying sand tothe flasks a rammer hung from the cover, and adapted to be locked to thecover when the latter is raised and unlocked when lowered to permitindependent working of the ramnler in a ramming operation, and means forlocking and unlocking the rammer.

15. In a molding machine, a sand-box, a pair of connected slides orvalves adapted to measure successive charges of sand to the sand-box,and from the latter to a flask, an arm connected with the slides andextending under the latter, a swinging flask-cover adapted to 811-,

gage said arm for operating the slides, and a rammer car ried by thecover.

16. The combination with a mold flask, a flask cover hinged above theflask to leave a space therebetwcen, a rammer hung from the cover, andmeans for operating the rammer in said space, of the dogspivoted to thecover. and means for operating the dogs to couple and uncouple therammer and the cover.

17. The combination, with a mold flask, of a Ilaslvcover, a rammerswingable with the cover and operated through the latter for ramming,and means for swinging the cover over the flask and operating therammer,

18. The combination with a mold flask, a flask cover, a rammer carriedby the cover, and means for giving the cover a hinge movement over theflask without contact therewith, of a latch slidable on the cover, and apivoted hand lever having pivot and hinge connections with the latch tolock and release the cover.

19. The combination with a mold flask, a flask cover hingedindependently of the flask, means for swinging the cover, and a rammerhung from the cover, of a latch slidable on the cover, a pair of dogspivoted on the cover, a pair of links pivotally connecting the latchwith the dogs, a pivoted hand lever, and the links having hinge andpivot connections, respectively, with the latch and the said hand leverfor operating the latch and the dogs.

20. The combination with a mold flask a flask cover, dogs pivoted to thecover, and levers pivoted to the cover for swinging the latterindependently of the flask, of a rammer pivotally hung from the leversand depending from the cover so as to be operated by said levers, a pairof dogs pivoted to work perpendicularly to the movement of said levers,a latch connected to the dogs, a hand lever connected to the latch forlocking and unlocking the cover and for operating the dogs to couple anduncouple the rammer with the covei:

21. -In a molding machine employing suitable flasks, the combination,with a sandbox, a swinging flask-cover, a rammer carried by the cover,and a pair of slides or valves, of an arm adapted to be worked by thecover, and the connections between the said arm and the slides tooperate the latter for alternately opening and closing the top andbottom of said box.

In witness whereof we hereunto set our hand in the presence of twowitnesses ADAM HELLER. DAVID HELLER. Witnesses GEO. L. MATTINGLY,FREDERICK ERcK.

